# okay till stop.

<IfModule mod_macro.c>
  <Macro ModMacro>
    Warning Thanks for using mod_macro!
  </Macro>
</IfModule>

<IfModule !mod_macro.c>
  <Macro ModMacro>
    Error Sorry, mod_macro must be installed to run this configuration file.
  </Macro>
</IfModule>

Use ModMacro

<Macro foo>
  Warning "macro foo"
</Macro>

Use foo

Error "done!"